Hybrid Drivetrain Design Using a Power Curve Heuristic Method
2022-01-0794
03/29/2022
- Event
- Content
- Emerging electrified powertrains benefit from efficient conversion and regenerative braking by storing energy in batteries rather than liquid or gaseous fuels. The downside of batteries, however, is that they're heavy and expensive compared to Diesel or Hydrogen fuel. A hybrid drivetrain, compared to a purely electric vehicle, can provide many of the same benefits with a much smaller battery. A heuristic is proposed to design hybrid vehicle architectures which achieve high energy efficiency while minimizing the mass and cost of onboard components. The heuristic uses vehicle power-energy curves to size motor, battery, engine, fuel cell, and hydrogen storage components to meet the required peak power and total energy storage requirements for various commercial vehicles configured as parallel, series, or powersplit hybrids. Commercial vehicles have distinct duty cycles to which a hybrid system must be closely tailored. The heuristic design method is verified using a vehicle drivetrain model, and resulting fuel savings are reported. The relationship between vehicle vocation and hybrid design will be investigated to provide insights for future electrification efforts.
- Citation
- Miller, E., "Hybrid Drivetrain Design Using a Power Curve Heuristic Method," SAE Technical Paper 2022-01-0794, 2022, .